Thank you very much! Right now I stream music with Qobuz (that has Hi-Res audio) and I'm building my offline library of flac files.I never really looked at my phone bluetooth version/drivers ecc but I bought my phone last year so I think it should be decent.

However I'm struggling to understand the whole "frequency response" thing. I can find various graphs but I don't really know what they mean.

Thank you for the very detailed explanation! It's sad to hear about the ANC nuking the sound quality but honestly unless is THAT bad, since I'm not an expert and I think that traffic/public transport nuke the sound more than the ANC I'm willing to make that sacrifice.

Right now I was looking at the Sennheiser Momentum 4. They seem to be good for my budget (I think they are on sale and I can buy them for 179€ (I think it's around $200)) and I could use them "wired" with USB-C. Do you think it's a decent choise (maybe outside with ANC and bluetooth and at home wired with USB-C)?

Thank you very much for the explanation! I'll pay more attention to that! Yeah for my use case the closed backed headphones seems the way to go. Thank you!